Intramolecular exciton diffusion in poly(3-hexylthiophene)

Andrew T. Healy, Bryan W. Boudouris, C. Daniel Frisbie, Marc A. Hillmyer, David A. Blank

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


Emission quenching by fullerenes covalently attached to both ends of a series of size-selected regioregular poly(3-hexylthiophene) samples was quantified and used to determine the intrachain exciton diffusion length. The diffusion length was found to be LD = 7.0 ± 0.8 nm. When the distance dependence of the quenching mechanism is considered, this is the same value that has been reported for emissive excitons in thin films. This result indicates that intrachain exciton transport is more facile for excitons localized to single chains than that for excitons that are delocalized between chains. In the context of solar cells, the result indicates additional complexity and the potential for competing issues when considering morphological design of the film to enhance both exciton and charge transport.

Original languageEnglish (US)
Pages (from-to)3445-3449
Number of pages5
JournalJournal of Physical Chemistry Letters
Issue number20
StatePublished - Oct 17 2013


  • conjugated polymer
  • energy transfer
  • thiophene fullerene triad


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